/Engine/Source/Editor/SceneOutliner/Public/ISceneOutliner.h
Set the item selection of the outliner based on a selector function. Any items which return true will be added
void SetSelection ( const [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< bool([ISceneOutlinerTreeItem](API\Editor\SceneOutliner\ISceneOutlinerTreeItem) &)> Selector )